Carpenter s square



T. F. LALOR,

' CARPENTERS SQUARE.

APPLICATION min NOV. 25, ms.

1,325.09'7. Patented Dec. 16,1919.

3 SHEEN-SHEET l.

T. F. LALOR.

CARPENTERS SQUARE.

APPLiCA'TkON FILED uov.25.191a.

325,097. Patented De12.16;1919.

3 SHEETS-SHEET 2 W INVENTOR J'Zomzs'fi Lazar.

1 /1, /6M/d"i TTORNEYS 1. F. LALOR.

CARPENTE RS SQUARE. APPLICATION FILED NOV- 25119181 Patented Dec. 16,1919.

"3 SHEETSSHEET 3.

11 4 .10 J 72 INVENTOR uni nn STA.

snoims jsnancrs nanon, or OAKLAND, onnrronnra.

CARPENTERS SQUARE.

Specification of Letters Patent.

Patented Dec. raisin.

Application filed November 25, 1913. Serial No. 264,108.

To all whom it may concern:

Be it known that I, THOMAS (Ft LALOR, a citizen of the United States,residing at Oakland, Alameda cunty, California, have in-'. vented a newand useful Carpenters Square,

square, and its object is to provide a square which will carry upon itsface all ofthe necessary inclination for the workman to make all thenecessary cuts to produce-all kinds of rafters for roofs.

An object ofthe invention is to provide asquare which will enable theworkman to instantly set; oil the necessary angles for roofs of nine (9)different pitches. Another object of the invention is to so form thesquare and its operativeparts as to produce all of the cuts in a glvenline thereby simplifying the operation of the square for the productionof after cuts.

And another object of the invention is to so separate the scales as tomake them easily read while at the same time they are so located as toproduce all of the cuts along a single edge of the square, therebysimplifying its operation.

Another object of' the invention is to produce a square capable ofgiving all of the cuts for a number of different rafters which will beof smaller size than the ordinary carpenters square and which willdispense with the necessary calculations of a carpenters square as usedfor producing rafter cuts.

it will be further understood by those skilled in the art that toproduce rafter cuts for a number of difierent pitches, that with theordinary carpenters square the workman must have a considerableknowledge of mathematics and a considerable experience in order to beable to make the cuts for dif- :ferent angles and pitches of rafters,while In the figures in which the same reference v numeral is applied tothe same portion throughout.

Figure 1 is a plan View of one side of the square. v

Fig. 2 is an edge view of the square.

F 3 is a plan View of the opposite side of the square.

-Fig. d is a side elevation of the slotted guide.

Fig. 5 is an edge view of the slotted guide. Fig. 6 is an end View ofthe slotted guide. Fig. 7 is a side elevation of one of the bolts forsecuring the slotted guide to the square.

Fig. 8 is a View o1 the bolt shown in Fig. 7 looking at right angles toView shown in Fig. 7 a

Fig. 9 is a'plan View of the square as it appears when used simply as asquare.

Fig. 10 is a plan View of the square when it is used to produce outs foroctagon or hip rafters. v

Fig. 11 is a plan View of thesquare as it is used to produce face cutsfor roof boards, polygon miters and backing cuts for hip rafters as wellas cuts for jacks, jack rafters or valleys.

Fig. 12 shows the slotted guide secured in a position at right angles toone of the bases of the square when used as a square, both bolts holdingit in place.

' The square consists of a flat piece of metal cut on a degree angle atthe corner 1 and having an armQ extending from the main body which mainbody has an opening 3 to lighten the square as well as two slots a and 5in which curved slots the guide holding -bolts 6 and 7 are movable. Thecurved slots have enlargenients 8 and 9 at their centers to provide acenter about which the guide may move as will be later explained.

The square is also provided with holes 10 and 11 for securing theslotted guide in the position shown in Fig. 9, and it has a hole 12 forsecuring the slotted guide in the position shown in Fig. 10, when thecuts for octagon hip rafters are to be made.

The slotted guide consists of a piece of sheet metal folded to form aT-shape with legs 1% and 15 on both sides of the slot, which legs aresecured together at 16 and 17 lay-soldering or otherwise. The slottedguide is also provided with three holes 18, 19 and 20, said holes beingso positioned as to per- Init the slotted guide to swing about theseveral'centers much as'may be necessary to produce the desired angleouts.

Along the l5-degree s ide of the square is a table giving the cutsfor-nine dill'erent pitches-of octagon hip rafters, which cuts arereferred to the center 12, and along this square on the same side willbe found. a table giving the cuts for jack rafters for hips or valleys,this table being referred to the center 9, and along the upper edge ofthe opening 3 will be found a table giving the nine different pitchesfor the backing of hip rafters. This table also refers to the center 9,

Along the bottom of the square will be found tables for bottom cuts foroctagon hip or valley rafters and for common rafters, these cuts beingreferred to the center 8, and all of the foregoing found on 3.

In Fig. 1 there will he found a table along the -degree edge of thesquare giving" the miter cuts for roof boards and the side boards forhip or valley ride'e or deck rafters; these cuts are referable to thecenter 9. On the opposite side of this leg of the square will be found atable for miter cuts for octagon hip rafter. This table is alsoreferable to the center 9, and along the upper side of the slot l Willbe found a table giving the face cuts for roof boards referable to thecenter Along the upper edge of the opening 3 is found a table giving thecuts for polygon lniters referable to the center 9.

Along the base of the square will be found the plumb cuts for commonrafters, hips and valleys and octagon hip rafters; these cuts are allreferred to theccnter 8.

a position to have its two screw bolts 6 and 7 pass through the slots 4iand These two bolts each have Wing nuts 22, and they have flattenedportions 23 just under their heads 24 which permit said bolts to slidealong the slots 4: or 5 as may be desired, or to he turned at such anangle with respect to said slots at either of the centers 8 or 9 as tocause the guide to pivotabout that cehter, the other bolt being used tosecure the guide rigidly in any desired adjustment. In operation theguide is moved to any desired out and rig- 45 idly secured in theposition desired, Whereupon the square is lid alongside of the rafter tobe cut with. the guide extending along the length of the rafter and thecut is at once indicated along the leg 5( Having thus described my invention What I claim as new and desire to secure by Letters Patentof theUnited States, is as follows, modifications Within the scope of theclaims being expressly reserved:

1. In a carpentefs square a flat plate, a slotted guide, openings insaid flat plate for securing the slotted guide along one side thereofand for pivoting it in several different positions, and a series oftables on the. plate carrying information for producing given angles,all of said tables being referred to one edge of the plate.

2. A carpentefis square comprising a flat plate,.a slotted guide adaptedto be secured to said plate, the square havingseveral holes about whichsaid guide may be pivoted, a series of tables upon both sides of theplate for producing different angular cuts, all of said tables beingreferred to a single edge of the square. I

3. A carpenters square having two slots I I therein, each slot beingconcentric with an In operation the slotted guide is placed in enlargedopening in the other slot, a slotted guide having openings therein,bolts for se curing said slotted guide in various adjust ments on thesquare and tables upon the square all referable to a single edge of thesquare for producing given angles along said edge.

THOMAS runners Litton

